innodb: remove recv_sys_mem_free - unused

Signed-off-by: Daniel Black <daniel@linux.vnet.ibm.com>

compile C/C with system zlib, when the server uses system zlib

This is necessary to analyze hangs on buildbot, because they also happen
when mysqltest executes external programs.

Replace the remaining "xtrabackup:" references in the code.

Some test are still disabled as they provide different results,
fail on different error or crash.

Fixes also MDEV-14060 InnoDB: Foreign key constraint to
geometry type does not work where test intentionally tried
incorrect cases.

Add missing innodb_gis tests.

followup for 4c2c057d

fix broken script (set -u)

MDEV-13918 Race condition between INFORMATION_SCHEMA.INNODB_SYS_TABLESTATS and ALTER/DROP/TRUNCATE TABLE

MDEV-14021 Failing assertion: table->get_ref_count() == 0 on ALTER TABLE with implicit ALGORITHM=INPLACE

Post-merge fix: Remove the now-useless use of table reference count.
The dict_operation_lock S-latch whose use was introduced in the 10.0
fix will prevent the table from disappearing due to concurrent
DDL operations (DROP, table-rebuilding ALTER, TRUNCATE).

If pid belongs to my_safe_process.exe, create crashdump of my_safe_process's
child, because my_safe_process is only used to start other programs.

InnoDB was writing unnecessary information to the
update undo log records. Most notably, if an indexed column is updated,
the old value of the column would be logged twice: first as part of
the update vector, and then another time because it is an indexed column.

Because the InnoDB undo log record must fit in a single page,
this would cause unnecessary failure of certain updates.

Even after this fix, InnoDB still seems to be unnecessarily logging
indexed column values for non-updated columns. It seems that non-updated
secondary index columns only need to be logged when a PRIMARY KEY
column is updated. To reduce risk, we are not fixing this remaining flaw
in GA versions.

trx_undo_page_report_modify(): Log updated indexed columns only once.

The method Field_iterator_table::create_item() must take into
account that it can be called when processing DELETE RETURNING.

An overflow of the double variable storing the estimate of the
number of rows in a partial join could trigger an assertion
failure during the optimization stage.

Fix a failure in rocksdb_rpl.rpl_rocksdb_2pc_crash_recover test.
Don't do XA with binlog if @@rocksdb_enable_2pc=OFF.

gcc 5.4 and 7.1, Debug and Release builds

remove remnants of 10.0 bugfix, incorrectly merged into 10.2

Using col_names[i] was obviously, wrong, must've been col_names[ifield->col_no].
incorrect column name resulted in innodb having index unique_id2(id1),
while the server thought it's unique_id2(id4).
But col_names[ifield->col_no] is wrong too, because `table` has non-renamed
columns, so the correct column name is always dict_table_get_col_name(table, ifield->col_no)

$WSREP_SST_OPT_CONF already includes --defaults-extra-file= prefix.

allow to build with the default port number 3306.
Now -DMYSQL_TCP_PORT=# sets the default port name and
-DMYSQL_TCP_PORT_DEFAULT=# sets the magic port=0 behavior,
if it's MYSQL_TCP_PORT_DEFAULT=0 it's enabled, otherwise - disabled.

Use mariadb_config, for C/C config variables

MDEV-13918 Race condition between INFORMATION_SCHEMA.INNODB_SYS_TABLESTATS and ALTER/DROP/TRUNCATE TABLE

i_s_sys_tables_fill_table_stats(): Acquire dict_operation_lock
S-latch before acquiring dict_sys->mutex, to prevent the table
from being removed from the data dictionary cache and from
being freed while i_s_dict_fill_sys_tablestats() is accessing
the table handle.